... and price 3)has strong magnetic force Large Ring magnet N35,N38,N40,N42,N45,N48,N50,N52(M,H,SH,UH,EH Largest ... with hole High coercive forceNeodymium Ring Magnet with N35,N38,N40,N42,N45,N48,N50,gradeProduct specifications:1. Ring NdFeB magnet with different grades of ... .4, Samples are always available here, welcome your inquiry, thanks. N50 large ring magnet